How much is one account? I don't think I will have enough money. I just faucet money. I not going buy bitcoin because it is not stable. Can I get a free sr.member account first and pay later?
How much is one mBTC? What is martingale?
How much to buy an account. I'm not sure. The price varies depending on activity and trust rating, and perhaps age of account. I'm not sure it's really worth it though, often these are bought by scammers looking to impersonate a trusted user. The good news is you can get a free Sr. member account by posting productively and putting in the time.
A mBTC=millibitcoin=1 thousandth of a bitcoin
martingale?
Read this:
https://en.wikipedia.org/wiki/Martingale_%28probability_theory%29